Callus is medically called “callus”, which can be removed through general treatment, medication, physical therapy and other ways. 1. General treatment: callus is due to long-term friction or pressure, resulting in the formation of local thickening of the stratum corneum, can protect the area from friction damage, generally do not need special treatment. If necessary, you can try to avoid friction and pressure, you can use warm water to soak, to be softened, and then use a knife to cut off the surface of the stratum corneum. 2. Medication: The use of sulfur salicylic acid ointment, vitamin A acid ointment and other exfoliators can gradually soften the stratum corneum, and the persistent use of calluses can be removed. 3. Physical therapy: liquid nitrogen cryotherapy, carbon dioxide laser and other treatments are also used to treat callus. It is recommended that patients who need to remove callus should consult a doctor in time, choose the best treatment under the guidance of the doctor, and avoid using medication privately to avoid delaying the condition.